Modelling and kinetic study of microwave assisted drying of ginger and onion with simultaneous extraction of bioactive compounds

Muhammad Kashif Iqbal Khan, Abid Aslam Maan, Rana Muhammad Aadil, Akmal Nazir, Masood Sadiq Butt, Muhammad Imtiaz Rashid, Muhammad Inam Afzal

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Onion and ginger are rich sources of bioactive compounds which are lost during conventional drying process. The present study was designed to optimize the novel Microwave Assisted Drying and Extraction technique (MADE) for simultaneous drying and extraction/recovery of bioactive compounds from model food products. The time required for drying of samples was 11 (onion) and 16 (ginger) minutes with recovery yield of 87% (onion) and 85% (ginger). The drying time was reduced to 100 times compared to hot air drying and moisture ratio of dried samples was best described by Midilli model. The diffusivities of onion and ginger slices were 1.27 e−11 and 1.43 e−11 m2/s, respectively. Moreover, microwave-based extraction was compared with conventional one. The results of antioxidant activity and total phenolic contents of condensates obtained through MADE were higher compared to conventional method. In short, MADE exhibited better yield of extraction and drying properties compared to conventional methods.

    Original languageEnglish
    Pages (from-to)513-519
    Number of pages7
    JournalFood Science and Biotechnology
    Volume29
    Issue number4
    DOIs
    Publication statusPublished - Apr 1 2020

    Keywords

    • Bioactive compounds
    • Ginger
    • Methanol extraction
    • Microwave drying
    • Onion

    ASJC Scopus subject areas

    • Biotechnology
    • Food Science
    • Applied Microbiology and Biotechnology

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